Acid protease

Chemical & Physical Data:

Composition:          Acid protease

Appearance:          White powder

pH (1%):                 5.0~8.0

Properties:

lDOWELLZYM AH can be applied for acid bating of hides and skins (the bating after normal bating), for bating of pickled pelts, wet blues and the crust retanned with vegetable and synthetic tanning agents.

lIt gives very fine, flat much clear and elastic grain.

lMildly opening up the fiber, improve softness, fullness without looseness in the belly.

lIt removes wrinkles and gives a more fine and elastic grain.

lImprove uptake of tanning / retanning agents and even dyeing.

Application:

lDOWELLZYM AH can be used for bating of pickled pelts, wet blues and retanned crust by adding directly in powder form at the range of pH 4.5-7.0 .

A) To treat the tough grain of goatskin & buffalo hide etc.

After normal bating, adjust pH to 6.0-6.5 with formic acid and then add DOWELLZYM AH for grain bating. The dosage of DOWELLZYM AH depends on the raw hides and skins and the leather types. Suggest dosage is 0.2% -1.0% .

B) Applied in pickling

At the beginning of pickling, adjust pH to 4.5-6.5, then treat with DOWELLZYM AH . The temperature should not exceed 28°C. Add acid to adjust pH of the float to meet the pickling requirements after DOWELLZYM AH bating.

C) On pickled pelt

DOWELLZYM AH can also be applied on the pickled pelts which have been bated insufficiently or become too dry after prolong storage and to remove wrinkles, fold marks and creases. Add the pickled pelts into 6-7 °Be common salt float, adjust pH to 4.5-7.0. The temperature should not exceed 28°C. and add DOWELLZYM AH for acid bating followed by re acidify the float to the required pH level for chrome tanning process.

D) On wet blues or crusts

DOWELLZYM AH can also be applied on wet blues or crusts to get further improvements. Before adding DOWELLZYM AH, it is better to rinse and wash the wet blues or crusts thoroughly. Then adjust the pH to 4.5-7.0, and temperature to 45°C, add 2.0%-4.0%  (w/w) DOWELLZYM AH  into the drum run for 1-2hours, then run automatically, the total treatment time could be 10-24hours .

Safety:

Enzyme is a kind of protein, contact may cause anaphylactic reaction; avoid breathing dust and contact with skin. If splashed into eyes, immediately wash with plenty of water.

Packing:

25KG kraft paper bag

Storage:

This product has a shelf life of 2 years if it is stored in its tightly sealed original packaging at temperature below 25℃. Bags should be tightly resealed each time after material is taken from them, and their contents should be used up as soon as possible after they have been opened. Non-dangerous chemical.